Feed-water heater



.m e h S m e h SK 2B ..b H CI .m Bm E MH &R Nm Nm An Mm SE Snr. A R G Bd. d 0. M 0 m No. 368,147. lPatented Aug. 9, 1887.

FIGB.

l N E NTO R S Mance/4:14 by mm.

ATT Y S ATT EST go. n. W44

(No Model.) 2 Sheets-Sheet; 2. P. GRASSMANN 8v M. B. GHEEK.

FEED WATER HEATER.

No. 368,147. Patented Aug. 9, 1887.

FICE.

FIGA.

A TT EST N. PETtRS. Phourlimognphnr, wnhingnm n.0.

UNITED STATES PATENT OFFICE.

PETER GRASSMANNAND MARGELLUS B. CHEEK, OF AURORA, INDIANA.

FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 368,147,date l August9, 1887.

Application tiled February 11i, 18S?. Serial No. 227,600. (No model.)

To LZZ whom it may concern:

Be it known that we, PETER GRAssMANN and MARoELLUs B. CHEEK, both ofAurora, Dearborn county, Indiana, havejoiutly invented a new and usefulImprovement in Feed-Vater Heaters, of which the following is aspecification.

Our invention is more particularly designed for use in thosesteam-generators which comprise two or more horizontal boilers, and ishere illustrated in connection with a pair of such boilers.

rlhe leading feature of our invention relates to an arrangement offeed-water pipes which utilizes them to uphold the furnace-crown. Ourfeed-water pipes being U-shaped and extending along over the spacebetween the boilers are (in the preferred form of our invention)themselves suspended by suitable rods from bridges which rest upon theboilers and span t-he space between them. Each suspension-rod ispreferably so incased in a tube communicating with and resting upon thecontiguous feedwater pipe as to protect it from direct contact with thefurnace heat.

The invention consists, further, in connecting the saidfeed-water-heating pipes with a specialsteam-dome whose communicationwith the steam-chest of the steam-pump enables it to be started and theconsequent supply of water to the boilers to be initiated considerablyin advance of any output of steam from the boilers themselves.

The above and sundry subsidiary features of our invention are fully setforth in our specification and claims.

In the accompanying drawings, Figure 1 is a perspective rear view of anarrangement of feed-water pipes and assoeiateddevices embodying ourinvention. Fig. 2 is a transverse section at or near the rear end of theboilers, looking forward. Fig. 2 is an enlarged detailed sectional view.Figs. 3 and 4 are sections which respectively represent two differentmodifications of the mode ot' supporting our feed-water pipes from thebridges. Figs. 5 and 6 are respectively a transverse section and a topview of a modification of our tilesupport.

rlhe grate, the fire-walls, and other details of the furnace are omittedfrom the above iignres.

The following parts lnay be of customary construction, and consequentlyrequire no specific description.

1 1 may represent two common horizontal steam-boilers. 2 may represent acustomary mud-drum,'whch may receive the delivery end of the feed-waterpipe 3 in the accustomed way. 4 and 5 may respectively indicate theordinary steam-chamber and steam-service pipe leading to the mainengine.

Associated with the above familiar parts of a steamgenerator is ourarrangement of feed- Water apparatus, now to be described.

6 represents the pipe which conveys cold water from the steam-pump.

7 is an air-collector. From the base ofthe air-collector 7 a branch, 8,leads to an ascending pipe, 9, whose only ordinary communication withdescending pipe 10 is through the U-shaped coil 1l, located in the upperpart ot' the furnace-space 12, between and parallel to the boilersl 1. Abranch, 18, connects the lower part of the descending pipe 10 with pipe3, which delivers the feed-water to the mudd rum.

In the preferred form of our invention the pipes 9 and 10 communicate attheir upper ends with each other and with an auxiliary steanrdome, 14,whose pipe leads to the steam-chest of the stcampump. (Not here shown.)

16 17 represent .two stop cocks, of which one, 16, is in the ascendingpipe 9, and the other, 17, is in the descending pipe 10.

In the starting of the apparatus the cock 16 is tightly shut and thecock 17 opened. The effects ol' such an arrangement ofthe cocks are,rst, to permit the steam generated in the coil 11 to escape to the pump,and by so doing to start'the feed-water in motion, and, secondly, tocompel the feed-water to traverse the coil 11, so as to get preheated onits route to the mud-drum.

Should it be desired, after commel'rcement of active generation in themain boilers, to draw steam for the pump wholly from them in the usualway, eommunicatiol'r is opened with the main steam-pipe 5,andthe passageto the auxiliary steam-chamber is closed, either by closure ofthe cock17 or of the throttle 1S. Lastly, by closure of throttle 18 and agreater or less opening ofthe cocks 16 17 feed-water IOO heads 21, beingengaged in said pipes,l andwliose screw-threaded upper ends being selcured in nuts 22, that rest upon the bridgecrowns, the said coil becomesthereby firmly suspended from said bridges. To protect the said rods orsuspenders from the direct contact of the heated gases of the furnacethey are inclosed in the tubes 23, which are kept filled with water bytheir communication with the said feed-water pipes, as shown at Fig. 2of the drawings. We utilize the thus upheld feed-water coil 11 tosupport in whole or in part the tile crown or coping of that portion ofthe furnace-space which intervenes between the boilers. 4

Various modifications may obviously be made of the above-described formof our inventionwithout departing from the essential features thereof.For example, contact of the the suspending-rods with the furnace heatmay be avoided without immersion of the rods in the water-space, asshown in Fig. 6, or the Suspenders may be of tubular .form andscrewthreaded at their upper portions for the fasteningnuts, as shown inFigs. 3, 4, and 5. The

feed-water coil may be composed of more than two convolutions, asrepresented in Figs.3 and 4. l

Our generator may be provided with eustomary or any suitablecheek-valves, 25, stop cocks 26, and mud or blowoff cocks 27.

Ve claim as new and of our invention- 1. The combination, with a pair ofsteamboilers, of the tile furnace-crown 24, resting on a feed-watercoil, 11, which is supported by suspension rods 20 from one or morebridges, 19, whose ends rest' upon the boilers, substantially as setforth.

2. In a feed-water heater, the combination, with the heating-ooilandSuspenders for suspending said coil, of a water-jacket surround ing saidSuspenders and having communication with the feed-water, substantiallyas set forth. y

3. The combination,with the heatingcoil 11 and the bridge 19, of thebolt 20, for suspending said coil from the bridge, and the pipe 23,incasing said bolt and having direct communication with the interior ofsaideoil, substantially as and for the purpose set forth.

4. The combination, with a preheating feed-water coil, 11, of theauxiliary steampassage for conveying steam to the steam` chest of thepump, substantially as described.

5. The combination, with the feed-water heater 11 .and the system offeed-water and auxiliary steam-passages 9 10 14 15, of the stop-cocks 1617, all arranged as shown.

In testimony of which invention we liere unto set our hands.

PETER GRSSMANN. l MARCELLUS B. GHEEK.

Attest:

GEO. H. KNIGHT, L. C. BLACK.

